Remove creation of the user account when initializing a database.

src/UnitTests.Databases.SqlServer.EntityFramework/EntityFrameworkDatabaseInitializerExtensions.cs

@@ -36,13 +36,6 @@ public static SqlServerDatabase Initialize(this SqlServerDatabaseInitializer ini
 
                 context.Database.EnsureCreated();
 
-                if (!string.IsNullOrWhiteSpace(connectionStringBuilder.UserID))
-                {
-                    server.Master.ExecuteNonQuery($@"
-                        IF SUSER_ID ('{connectionStringBuilder.UserID}') IS NULL
-                            CREATE LOGIN [{connectionStringBuilder.UserID}] WITH PASSWORD = '{connectionStringBuilder.Password}'");
-                }
-
                 initializer.IsInitialized = true;
             }